KTM 125 SX User Manual

21 TECHNICAL DATA 121
21.3.7 250 SX
Carburetor type KEIHIN PWK 36S AG
Carburetor identification number BS8_0
Needle position 2nd position from top
Jet needle N1EH (N1EF, N1EG)
Main jet 158 (160, 162)
Idling jet 42 (45)
Starting jet 85
Idle air adjusting screw
Open 2 turns
Throttle slide 6.5 with cut-out
21.3.8 Carburetor - basic setting for sandy surfaces (250 SX)
Idle air adjusting screw
Open 1.5 turns
Idling jet 45
Jet needle N1EF
Needle position 5th position from top
Main jet 170
Info
If the engine is not running smoothly, use a smaller main jet.

KTM 125 SX Specifications

General

Engine Type	1-cylinder, 2-stroke engine
Displacement	124.8 cm³
Bore/Stroke	54 mm / 54.5 mm
Starter	Kickstarter
Transmission	6-speed
Rear Suspension	WP XACT shock absorber with linkage
Front Brake	Disc brake
Rear Brake	Disc brake
Ground Clearance	375 mm
Seat Height	950 mm
Cooling	Liquid cooled
Front Suspension	WP XACT USD, Ø 48 mm
Fuel System	Carburetor
Clutch	Wet multi-disc clutch
Frame	Central double-cradle type in chrome-molybdenum steel